What does 'STD' mean for crankshaft bearings?

STD stands for standard size. This means the bearings are designed to fit a crankshaft that has not been machined or ground undersize. If your crankshaft has been repaired or modified, you may need an undersize bearing set.

Why is proper oil pressure important for main bearings?

Main bearings create a thin film of oil between the crankshaft and the engine block, reducing friction and wear. If oil pressure is too low due to worn bearings, this film breaks down, leading to increased friction, heat, and potential engine damage.

Do I need to replace the crankshaft as well?

This set includes the main bearings. You would only need to replace the crankshaft if it is damaged, warped, or has been machined undersize beyond the range of available bearings. Always inspect your crankshaft thoroughly before installing new bearings.

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Est. 1957

Specifications

Brand: ACL
Part #: 5M5647A-STD

ACL FORD 281 330 Engine Crankshaft Main Bearing Set

Name: ACL FORD 281 330 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-281-330-engine-crankshaft-main-bearing-set-t14-632430
Price: 29.02 USD
Availability: BackOrder

$29.02

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Fits 1999-2002 INFINITI G20. ACL Crankshaft Main Bearing Set 5M5647A-STD gets you back to reliable starts.

Key Features

Fits 1999-2002 INFINITI G20.
Standard size (STD) crankshaft main bearing set.
Built to meet original equipment specifications.
Helps restore proper engine oil pressure.
Restores smooth engine operation.

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About this part

Product Details

This ACL main bearing set is built to meet the original equipment specifications for your 1999-2002 INFINITI G20. When your engine's crankshaft main bearings wear out, they can cause excessive clearance, leading to low oil pressure and potential engine damage. Replacing them with a well-built set like this helps restore proper oil pressure and ensures your engine runs smoothly.

This is a standard size (STD) bearing set, meaning it's designed to fit a crankshaft that is still within its original factory tolerances. If your crankshaft has been previously machined or ground undersize, you would need a different bearing size. Always confirm your crankshaft's condition before ordering bearings.